Voice Song (delivered after dark) is a liquid Whip-poo-weel, the middle syllable slightly stuttering; call is a liquid quip.

Discussion Long-winged, long-tailed bird with a large head and huge gape, with which it engulfs flying insects. Nocturnal, feeding mainly on moths and beetles. Eyes are large, but hidden by partly-closed eyelids in daytime. Beautifully patterned plumage provides superb camouflage when resting on tree branch or fallen leaves in daytime. Sexes are separable.